A cloud-based identity and access management service for securing user authentication and resource access
This isn't possible for two reasons:
- Entra ID doesn't have "manager's email" as an attribute on a user. Source attributes can only be attributes on the source object being provisioned, not from related/linked objects like managers.
- The custom attribute you've added, manager.email, is a complex SCIM attribute. Entra's app provisioning service does not support adding custom attributes that are complex or multi-valued.